US2524440A - Machine for making wooden heels - Google Patents

Description

Oct. 3, 1950 F. N. GRAsBr-:RGER

MACHINE FOR MAKING WOODEN mams 2 Sheets-Sheet l Filed Sepc. 26, 1949 INVENTOR.

Francis N. G rasberer.

Oc- 3, 1950 F. N. GRAsBl-:RGER 2,524,440

MACHINE FOR MAKING WOODEN HEELS Filed sept. 26,I 1949 2 sheets-sheet 2 INVENTOR.Y Ranch; N Grasberger.

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ATTO R NE Patented Oct. 3, 1950 UNITED STATES PATENT OFFICE MACHINE FOR MAKING WOODEN HEELS Francis N. Grasberger, Lynchburg, Va. Application September 26, 1949, Serial No. 117,883

15 Claims.

The present invention relates to wood working machines and more particularly to an improved method and apparatus for performing a shaping operation on wedge shoe heels.

In the shaping of wedge heels certain types have a portion removed from under the arch, referred to as scooping or tunneling, to provide a curvature extending from the flat heel portion to the end of the shank. As far as applicant is aware, scooping or tunneling is usually done after the wedge has otherwise been completely shaped, the accepted practice being to manually place the wedge in a chuck, pass the wedge over a cutter, then remove it from the chuck. These operations are relatively slow, and notwithstanding use of comparatively skilled operators, considerable wastage occurs due to splitting.

An object of my invention is to provide an improved machine for scooping or tunneling wedge heels.

Another object of my invention is to provide an improved method for scooping or tunneling wedges.

Still another object of my invention is to provide a machine wherein .automatic scooping or tunneling is accomplished, the machine being" of such simple and rugged construction that it may be operated eihciently `and with a high rate of production by unskilled labor.

Yet another object of my invention is to provide amachine for scooping or tunneling wedges constructed and arranged whereby a predetermined uniform cut is obtained.

A further object of my invention is to provide a machine for scooping or tunneling wedges wherein wastage due to splitting is substantially completely eliminated.

With these and other objects in view, which may be incident to my improvements, the invention consists in the parts and combinations to be hereinafter set forth and claimed, with the understanding that the several necessary elements, comprising my invention, maybe varied in construction, proportionsand arrangements, without departing from the spirit and scope of the appended claims.

In order to make my invention more clearly understood, I have shown in the accompanying drawings means for carrying the same into practical effect, without limiting the improvements in their useful applications to the particular constructions, which for the purpose of explanation, have been made the subject of illustration.

In the drawings:

Figure l is a side view of a machine incorporating the invention herein; i

Fig. 2 is a plan view of Fig. 1;

Fig. 3 is an end View as seen looking at the discharge end of the machine;

Fig. 4 is a view of the wedge with the heel and shank seat formed; and

Figs. 5 and 6 are schematic views showing the method of scooping or tunneling.

The machine of the present invention is adapted to shape the shank of a wedge blank of the type shown in Fig. 5, wherein the shank and heel concavity have been cut, but the sides thereof have not been turned. The wedges are automatically fed into the forward or feed end of the machine in side-by-side abutment, i. e., with their length transverse of the machine, scooped and then discharged from the after, or discharge end of the machine.

Referring to the drawings, and more particularly to Figs. l and 2, the machine includes transversely spaced L-shaped forward uprights l0, central uprights l2, and rear uprights lll, designed to support a horizontal table member IS, preferably welded to the uprights. The table I6 is formed with a rectangular opening I8, extending substantially three-quarters the length of the machine, the portion of the opening forward of the central uprights being wider than the rear portion thereof, for purposes to be described hereinafter. The table carries an L-shaped guide or positioning bar, designated generally by the numeral 20, against which the back of the wedge is placed. The bar 2l] extends longitudinally of the table and is arranged with one leg 2,2 vertical to the plane of the table, and the other leg 24 resting thereon and extending outwardly toward the edge of the table. The leg 24 is provided with spaced openings 26 (Figs. 1 and 2) aligned with transverse slots 28 in the table and through which locking bolts 30 may be passed to secure the guide bar 20 in any adjusted position, depending upon the length of the wedge.

Positioned in the opening I8 between the forward and central uprights is a conveyor means B, including an endless belt 32, having transverse treads 34 thereon, the treads being of width substantially equal to the width of the opening I8. The belt 32 is mounted on drums 36 and 38, sem cured to suitable shafts 46, 4d', respectively, for rotation therewith. The end portions of the shaft 4) are mounted in bearings M carried by brackets 46, attached to the forward uprights lil, and shaft f is similarly supported on bearings 44 carried by brackets 46 secured to the central uprights I2.

Associated with and above the conveyor are a plurality of gravity ,or spring actuated pressure rollers 52, rotatably mounted at the lower ends of supporting arms 53, the latter being pivoted as at d, to a longitudinally extending rectangular frame 55. The frame 55 is adjustably mounted at each end in a cross member 56, extending between the pairs of forward uprights ill and center uprights l2, the ends of frame member 55 being supported by studs 5l extending through transverse slots 59 in the cross members 56 for receivingr securing nuts 5i, whereby the rollers may be adjusted transversely of the machine. In order to compensate for different wedge depths, the cross members 56 are also vertically adjustable, the ends of each cross member being secured in position by a bolt 5B and nut 6U extending through an opening in the cross member and an aligned vertical slot 2 in the supporting uprights (Fig. 3).

With reference to the structure so far described, it may be considered as the conveying zone inasmuch as the work pieces or wedges A are fed onto the conveyor treads iii beneath the rollers 52, 'the latter being adjusted to a proper heig-ht whereby they will exert sufficient pressure on the wedges to keep them in contact with the treads but without impeding their forward motion. Upon leavin-g the conveyor, the wedges pass into what may be termed the scooping zone, the heel portions of the wedges being supported on the table top shelf t3 and the forward shank portion being unsupported and overlying the narrowed portion it of opening iii.

Positioned in the opening i8' is a rotary cutter lil, the latter being mounted on a longitudinally' extending shaft l2, whereby the cutter is arranged transversely of the table. The shaft 'l2 is mounted in spaced bearings l'f'i carried on a vertically adjustable horizontal platform lli, which is adjustably carried on the lower threaded end of a vertically arranged adjusting lever i8, rotatably mounted in a bracket 8i) welded or otherwise secured to the table top (Fig. 3). Secured on the lever above and below the bracket are collars whereby upon rotation of the handle portion Sii, the platform will be raised or lowered. To prevent the platform 'l5 from rotating, the end opposite the lever is provided with a pair of projections tlf which straddle a guide plate 8S vertically depending from the table top and welded thereto. Each side of plate 88 has a vertical groove gli therein for receiving the corresponding shaped end of a guide pin 92 extending through the adjacent projection 3b. By the aforesaid means, the cutter may be raised or lowered necessary to dispose a portion above the table top in the path of the wedges. The cutter may be driven in any suitable manner, in the embodiment shown there being provided with a pulley :'35, connected through a belt et to any suitable source of power, not shown.

Adapted to cooperate with the cutter lil, and to set or position the wedge in proper cutting or scooping engagement, is a setting or positioning roller it@ rotatably mounted above the cutter periphery on an axis it? :carried on the inner end of a horizontally arranged and transversely extending supportingarm iilil. The arm IBIS is vertically adjustable on supporting studs M5 arranged transversely of the machine and extending vertically from the top plate. As best seen in Fig. 3, the axis of the positioning roller is preferably arranged at an angle of approximately to the Vertical, whereby it will be in a plane at substantially right angles to the point of contact on the wedge. There is further associated with the cutting means a biasing roller Hi8 rotatably mounted on a transverse pivot in the bifurcated end of a lever l i8 pivotally mounted on a bracket HQ adjustably mounted in the cross member 56. The lever H8 is normally biased toward rotation in a clockwise direction by a, spring H2 which is further tensioned when a wedge enters under the roller.

It will also be noted that the centers of the pivots of rollers Iil and |03 are in the same vertical plane, and that this plane is parallel to the forward face of the cutter 10. Thus, as a wedge comes into alignment with the roller centers, it is engaged by the rotary cutter 1G. Moreover, the arrangement is such that the positioning roller |00 is to one side of the axis of the cutter and the biasing roller to the other, with the edge of the shelf 63 intermediate of the biasing roller and cutter. The reasons for this arrangement will become apparent from the following description of the method of operation.

Considering the operation in the cutting zone, the positioning or setting roller lili! and rotary cutter will initially be adjusted relative to one another to provide the proper spacing for the desired depth of cut. The axis of roller lili! must be positioned so that the approaching wedge will be engaged in its third quadrant, whereupon further pressure will cause the wedge to enter under the roller. In entering' under the roller, the forward or shank edge of the wedge will be forced or pivoted downwardly and the heel end upwardly, the end of shelf 53 now functioning as the pivot bar on which the wedge is totally supported. Upon engaging roller |00, the wedge will also have passed under the biasing roller Hi8, which will continue to exert a downward force thereon tending to pivot the heel downwardly and thus keep the shank in contact with roller Ill. As the wedge comes into engagement with the cutter, it will'be backed by the successive wedges which hold it rm and also assist in absorbing the force with the result that face splitting is substantially completely eliminated.

If the top of the wedge is at, it will be forced past the cutter in a given plane, and due to the pivoted position, a uniform straight line cut will be obtained. In like manner, if the heel is concaved, a uniform cut will be obtained on the front of shank portion of the heel, and at the same time, the breast line formed by this cutter will remain a straight line. This is due to the fact that the breast line of the heel block is at the point where the block pivots. This action is illustrated in the exaggerated schematic views of Figs. 5 and 6. As there is shown, the wedge has a concavity designated as C and the pivot designated by the broken line P. Upon the wedge engaging the cutter, it will leave a front edge having a thickness T. As the wedge moves forwardly, the concavity will come beneath roller lili), however, upon so doing, the biasing roller IUS will pivot the block so that contacting engagement between the shank and roller |00 is retained. In this way, the front edge thickness T will be uniform across the wedge.

From the foregoing it will be seen that there is provided a machine wherein a plurality of wedges are fed successively, in side-by-side abutting engagement to a cutting device, together with means for adjusting the foremost wedge to proper cutting position and holding it in proper position throughout the cut. As the entire operation is automatic, a uniform scooping of the wedges is assured, with a very high veyor for engaging the rate of production. Moreover, as the adjustments are all very simple, the machine may be operated by relatively unskilled labor.

While I have shown and described tbe preferred embodiment of my invention, I wish it to be understood that I do not confine myself to the Iprecise details of construction herein set forth by way of illustration, as it is apparent that many changes and variations may be made therein, by those skilled in the art, without departing from the spirit of the invention, or exceeding the scope of the appended claims.

I claim:

l. In a machine of the character described, cutting means for scooping the shank of a heel wedge, means associated with the cutter means for setting the wedge in cutting position, and means for maintaining a Wedge in engagement with the setting means throughout the cut.

2. In a machine of the character described, rotary cutting means for scooping the shank of a heel wedge, means associated with the cutting means and to one side of the axis thereof for setting the wedge in cutting Iposition, and means located to the other side of the axis of the cutting means for maintaining the Wedge in engagement with the setting means.

3. In a machine of the character described, a rotary cutter, a support for one end of a heel wedge located to one side of the axis of the cutter, f

a biasing roller located above said support, and a positioning roller associated with the cutter and located on the other side of the axis thereof.

4. In a machine of the character described, a support for one end of a heel Wedge, biasing means Ipositioned above said support, cutting means adjacent said support and at right angles thereto, and setting means associated with the cutting means to the side away from said support.

5. In a machine of the character described, i

a longitudinally extending shelf for supporting the heel portion of a wedge, a biasing roller disposed above the shelf for engaging the top surface of the wedge supported portion, a transversely disposed rotary cutter positioned adjacent the shelf to scoop the unsupported portion of the Wedge, and a positioning roller disposed above the cutter for engaging the top surface of the wedge unsupported portion.

6. In a machine of the character described, a transversely disposed rotary cutter, a positioning roller adjacentthe cutter and to one side of the axis thereof, a work support adjacent the cutter and to the other side of the axis thereof, and a biasing roller above said .vork support.

7. In a machine of the character described, a transversely disposed rotary cutter, a longitudinally disposed positioning roller adjacent the cutter and to one side of the axis thereof, a work support adjacent the cutter and to the other side of the axis thereof, and a longitudinally disposed biasing roller above the work support.

8. In a machine of the character described, a conveyor for continuously moving a plurality of heel Wedges in side by side abutment, a plurality of pressure rollers disposed above the consupported wedges), a longitudinally extending shelf onto which the wedges are fed, a transversely disposed rotary cutter adjacent the shelf and in the path of movement of the wedges, a positioning roller spaced above the cutter and to one side of the character described, a

moving of the axis thereof, of the Wedges, and a the top surface of of the axis of the character described, a

gaging the top surface of the Wedges to the other side of the axis of the cutter.

11. In a machine for scooping the shank of engaging and tilting the Wedges to cutting position.

12. In a machine for scooping the shank of wedge heels, Wedge feeding means, a pivot bar onto which the wedges are fed, means for pivoting the Wedge about the pivot bar and into cutting position, and a cutter for scooping the wedge in its cutting position.

13. The method of scooping Wedge heels which comprises arranging a plurality of wedges in side by side abutment, simultaneously moving said wedges forward, tiltng the foremost Wedge to lower the arch end and raise the heel end, then moving the lowered end of the tilted Wedge across the cutter.

end, then movin-g the lowered end of the tilted wedge across a cutter.

15. In a machine of the character described, a horizontal table top having a Wide rectangular opening in its forward part and a narrower portion extending into its after part, a conveyor means disposed in the wide rectangular opening, pressure rollers positioned above said conveyor means, a transverse rotary cutter disposed in the narrower part of the opening, a positioning roller carried to one side of the cutter and a biasing roller carried on the other side and above the table top.

FRANCIS N. GRASBERGER..

No references cited.

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